readFromSource(byte[ ] [ ], int, int, byte[ ] [ ])

Reads data from the data source. This method reads the specified number of bytes into the application buffer from the data source starting at the specified position in the data source.

Not all source plug-ins require that the data source be opened before it can be read. However, to ensure that an application will work with any current or future source plug-ins, call the openSource(byte[ ], byte[ ] [ ]) method before calling this method.